Apparatus for cooling and freezing fish and other food substances.



N. DAHL. APPARATUS FOR COOLING AND FREEZING FISH AND OTHER FOOD SUBSTANCES'.

APPLICATION FILED MAR. I4' 1914. v

l Patented Mar. 28, 1916.

3 SHEETS-SHEET I.

n Il R III. .1;

Attclrneg N1. DAHL.;

APPARATUS FOR COOLING AND FREEZING FISH AND OTHER FOOD SUBSTNCES.

APPYLICATION FILED MAR. I4. I9 I4.

Panted Mar. 28,1916.

3 4SHIIIiTS--SHEET 2.

Imm)

'Witnessasz Att n rneg l N. DAHL.

APPARATUS FOR COOLING AND FREEZING FISH AND OTHER FOOD SUBSTANCES. APPLICATION FILED MAR. 14. 1914.

1,177,308. Ptented Mar. 28, `1916.

3 SHEETS-SHEET 3.

.Ait urney UNITED STATES PATENT OFFICE.

NEKOLAI DAHL, OF TONDHJEM, NORWAY.

APPARATUS FOR COOLNG -AND FREEZING FISH AND OTHER FOOD SUBSTANCES.

Specification of Letters Patent. I l Patented lua?. 28, 1916. i

Application led March 14, 1914. Serial No. 824,647.

To all whom it may concern.' A Be it known that I, NEKoLAI DAH'L, subject of Norway, residing at Fjordgaten 49, Trc-ndhjem, Norway, have invented new and useful Improvements in Apparatus for Cooling and Freezing Fish and other Food Substances, of which the following is aspecification. y

Arrangements forcooling and freezing fish and other articles of food 4by means of a circulating cooling mixture, are well known. The saidmixture has a temperature below 0 degrees centigrade and is made to trickle down between or among the goods in order to completely and thoroughly freeze them. l/Vhen such a clrculating cooling mixture shall again be employed, a number of difficulties arise nter alia, on cooling and cleansing the mixture.

The actual cooling will be effected most quickly and advantageously in special apparatus or containers, and in one form of appliance hitherto known for cooling purposes the liquid 4to be cooled has been passed through a container, within which it was able to move repeated times up and down along one side of transmission walls, the opposite side of which was in contact with the cooling medium, the latter andthe liquid being thus completely sepa'rateiy from each other. But the passagepf the liquid up and down was caused only by the difference in 'specific gravity of the several-parts of the.

liquid on account of the diference in tem- Thealternating passage of the liquid therefor was not safe', and it very well could happen, that many parts of the liquid could stream directly through the;VV container without making any movement up' and down especially if the velocity of the liquid was a comparativelyv nigh one.'

According to4 the present nventionthe cooling container isfurnished with partitions in such a manner that the liquid to be cooled is obliged to pass in an alternating continuousr stream through compartments formed between thepartition walls in contact with cooling pipes or with a freezing medium (for example -a mixture of ice and salt) placed within the'said compartments. Hereby it is possibleto cause the liquid during its course through the cooling container to rapidly acquire a lov's7 temperature.

In combination with a cooling device as mentioned above, the present invention has also for its object to provide an irrigation apparatus consisting of one or several'horizontal pipes placed over the goods and from the upper side of which irrigation pipes pass downward*with a Siphon-like bend, the object ot'v this arrangement being to obviate 4the foimation of scum in the cooled liquid and also to prevent possible impurities from passing over the goo'ds'to be cooled or frezen.

j A construction according to the invent/ion is illustrated in the accompanying drawings,

up at -6`insuch a manner that the perforation at the entrance end of the container (to the left) is situated highest and the nextv ones on successively lower levels, so that the perforation at the extreme right lies lowest.

0n the left Vthepocket has an inlet -7 at a somewhat greater height than the uppermost perforation t-and to the right a pipe -8- passes through the bottom to the outlet pipe -9-2- which passes through a pump lO-and stop-cock l1- to a 4horizontal adjustable pipe -10-, where the irrigation pipes 13v are placed.

vThe pipe l2- is situated above the goods (e. g. ishboxes as indicated in the drawing). After having circulated through these, the water is collected on a vsort of pan 14;- and is thence conducted'to a collecting and cleansing container -15, the outlet 7- of which is obstructed by a downwardly projecting part of a circular sieve 16 driven bya shaft 17. Before'the water collected in the container 15 can reach the outlet 7 and from thence '-to the cooling container 1, it'must pass through the said part of the sieve. i

As will be seen in Fig. 1 the liquid in the` lwhile the other walls are perforated higher y land partly by the aid of the pump 1Q. During this long journey it 1s exposed to the cooling, either by several of the cham. bers -3- being filled with ice and salt as indicated in the drawings, or by means of cooling pipes 18- these chambers, or by both of these methods. The pipes -18- are connected at 19- with cooling machines, that may be of any suitable' construction. In this Way the liquid, during its progress from the intake -7- to the outlet -8-, is very rapidly colled down to a low temperature.

Instead of a 'single cooling container, several may be employed, the same serving as sections.

VViththe object of 'further regulating the temperature -of the cooling mixture, the liquid or a part thereof maybe made several times to stream through the cooling container before beinglutilized for the cooling of goods.

Instead of conducting the cooling liquid l Afrom 'the generator or containers to the -made to ll the goods, which it is desired tol cool, these goods can also be placed in the cooling container themselves or in the separate sections 3 ofthe same, with or without the packing or Wrappings in which they are transported. In this case also the stream of cooling liquid passing between or among the goods will thornughly coolthe goods with great rapidity.

The collecting pocket or chamber l5- with the sieve 16- may be placed at the entrance to the cooling container -1 or also between the dividing Walls of the same. The sieve -16- will collect particles of herring, dirt, mud and scum, which by the aid of the sieve can be lifted out ofthe water and then removed by suction or blowing, most suitably by means of a centrifugal fan -20- with a suction pipe -`21-. ,The impurities thus removed traverse a pipe Q2- to the drain or to a vessel arranged for that purpose. In this manner it is possible to keep the circulating liquid always clean.

In order to prevent the formation of scum, the irrigation pipes -13- are not carried direct downward from the lowest portion of the pipe -12-, but they proceed from the top part of the pipe in a Siphon-like bend. In this way the liquid is pipes -13- entirely. Moreover only the cleanest cooling mixture will find an exit'througli the upward bending curves, while heavier particles such as particles of salt, mud and dirt that inay accompany the liquid, will follow the base of the pipe 12- and mav be emptied out stop-cock 423.- in the lower end of the same;

Q4- is a pipe from a water-conduit, -25- a stop-cock on a discharge hose 26with a movable pipe -27-. F urther placed in certain of` -28- is a circulating pipe furnished with a stop-cock 29-, from the back of the sieve past thc container -l.- to the pump--10-, and finally -30- is a drainage pipe for the container -1-.

Having now described my invention, what I claim as new and desire to secure by Let, Vters-"Patent is.:

l. In cooling liquids by passing the same` through a container in which'it is subjected to a cooling inuence in passing repeated -times in alternating directions within the container, an arrangement in cooling or ,y

freezing plants which operate with a circulating cooling liquid, comprising a container provided with partitions arranged in such a manner that the liquid to be ccoled is' caused to pass in an alternating continuous stream through compartments formed between the ing lish and other food substances, a container divided into a number of parallel compartments extending vertically, said compartments having alternate communication at the bottom of the container and successively decreasing from a top level, in height toward the discharge end thereof, wherebyV the stream is caused to take an alternating zig-zag path, cooling means within the compartment for rapidly reducing the temperature of the cooling liquid during the course through the'container, means for supplying the liquid to the con` tainer and means for discharging the same.

3. Inan apparatus for cooling and freezing' sh and other food substances, a container divided into a number of parallel compartments extending vertically, said l during the course through the container, a.

discharge for the container, means for drawing and elevating the liquid discharged from the container to 'a point above the same, an irrigating apparatus .consisting `of a plurality of pipes horizontally dispcsed and placed over the goods to. be treatedp ipes extending upwardly from the top portions of said irrigating pipe and downwardly beneath the saine, said pipes having discharge portions leading from the bottom portions thereof and the upwardly extending pipes being in the'. form of Siphon-like bends whereby the formation and escape of scum and foreign matter or impurities to the goods irrigated, is prevented.

4. In an apparatus for clooling food and other substances, a container, spaced partitions arranged within the container and hav-` ing alternate communication near the b0t` tcm and at spaced points above the bottom extending fromv the top to the bottom of the container from the inlet tothe discharge end thereof, a pan having a pocket adjacent to the inlet end of the first-named container, means for draining the pocket, af discharge for the'container leading from the bottom thereof, irrigating pipes disposed over the pan for discharging on to the goods to be treated, discharge means leading from the pocket ofthe pan to the discharge ofthe l container and having valve connections interposed with Arespect thereto, a pump for discharging the I iquid from the container tothe irrigating pipes above the pan whereby the same will return to the' container from the pan and through the inlet, a rotating sieve Jadjacent to the inlet and through which the liquid 'must pass before discharging into the container and means for removing Waste particles and impurities from the sieve during the rotation thereof.

In testimony wherepf- I have signed my name to thisspeciicati'on in the presence of two subscribing witnessesf A NEKOLAI DAHL.

Witnesses: f

TRYGUE OLsoN, AAsE SoRENsEN. 

